n. 
暗,暗淡,朦胧
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centre of curvature,
centre of gravity,
centre of mass,
centrebit,
centre-bit,
centreboard,
centrebody,
centre-crank,
centrecut,
centred,
相似单词
obscur,
obscurant,
obscurantic,
obscurantism,
obscurantist,
obscuration,
obscure,
obscured,
obscurity,
obsecrate,